Foraminifera of the Gault of Folkestone. By F. Chapman. 581 
Lagena apiculata Reuss, plate VIII. figs. 2 a, b, and 3 a, b. 
Oolina apiculata Reuss, 1850, Haidinger’s Naturw. Abhandl., 
vol. iv. p. 22, pi. i. fig. 1 . Lagena apiculata , var. elliptica Renss, 
1862, Sitznngsb. d. k. Ak. Wiss. Wien, vol. xlvi. p. 35, pi. ii. fig. 2. 
L. apiculata Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi. 
p. 319, plate i. figs. 4-8, 10, 11. L. apiculata Brady, 1884, Chall. 
Rep., vol. ix. p. 453, figs. 4, 15-18. L. apiculata Burrows, Sherborn 
and Bailey, 1890, Journ. Roy. Micr. Soc., p. 555, plate IX. figs. 6, 7, 
9-11. 
This somewhat variable form is widely distributed through the 
Gault, and is perhaps the commonest of all the Lagense from that 
formation. The two specimens figured give an idea of the variation 
in the shape of the test ; the pyriform variety, with a circular aperture, 
is much more common than the globose form with bordered fissure. 
It has been found in beds as old as the Lias ; and in recent deposits 
it affects shallow and deep water alike. In the Cretaceous rocks it 
has been found in the North-German Gault* and the Belemnitella 
mucronata bed of Galicia (Reuss) ; in the Red Chalk of Speeton, &c. 
(Burrows, Sherborn and Bailey) ; and in the Chalk of the North of 
Ireland (Wright). It is found in the Gault of Folkestone in zone i. 
specimen b, very rare ; zone ii., specimen a, very rare ; zone iv., very 
rare ; zone v., very rare ; zone vii., very rare ; zone x., very rare ; 
zone xi., 55 ft. from the top, rare ; 50 ft., frequent ; 45 ft., very 
common ; 40 ft., very rare ; 35 ft., rare ; 30 ft., frequent ; 25 ft., 
frequent ; 12 ft., rare ; 6 ft., very rare. 
Lagena apiculata , var. emaciata Reuss, plate VIII. figs. 4, 7. 
Lagena apiculata , var. emaciata Reuss, 1862, Sitzungsb. d. k. 
Ak. Wiss. Wien, vol. xlvi. p. 319, pi. 1, fig. 9. L. apiculata , var. 
emaciata Burrows, Sherborn and Bailey, 1890, Journ. Roy. Micr. 
Soc., p. 555, plate ix. figs. 8, 12, 13. 
This variety has been found in the Septa ria-clay of Pietzpuhl 
(Reuss.) ; and in the Red Chalk of Speeton (Burrows, Sherborn and 
Bailey). It occurs in the Gault at one horizon only ; zone xi., 45 ft, 
from the top, rare. 
Lagena Isevis Montagu sp., plate VIII. fig. 5, 
Vermiculum Iseve Montagu, 1803, Test. Brit., p. 524. Lagena 
Isevis Brady, 1884, Chall. Rep., vol. ix. p. 455, pi. lvi. figs. 7-14, 30. 
L. Isevis Burrows, Sherborn and Bailey, 1890, Journ. Roy. Micr. 
Soc., p. 555, plate IX. fig. 3. 
The specimens of this Foraminifer which occur in the Gault are 
somewhat variable in size, and are occasionally smaller than the one 
* N.B. The Gault of Germany is equivalent to the Gault and Lower Greensand 
of England. 
2 s 2 
